A certain radioactive element has a half-life of one hour. if you start with 1.0 gram of the element at noon, how much of the radioactive element will be left at 2 p. m.? 0.50 grams 0.25 grams 0.125 grams 0.0 grams

Match the term with its description. alkaline ion ph Acid A) A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water B) A compound that increases the hydroxide ions (OH-) when it is dissolved in a

Which of these equations correctly expresses the self-ionization of water? A) Upper H subscript 2 upper O superscript plus upper H subscript 3 upper O superscript plus double-headed arrow upper H subscript 2 upper O plus upper O upper H superscript

Which planets distance from the sun is 778,600,000

Give reason: neon is a inert element

Describe the motions of particles in the 3 common states of matter

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is

What is an oxidizing agent?

In times of hot dry weather some cities ban the use of garden sprinklers why do you think there is such a rule